The Beilen CHP plant

A gas turbine CHP scheme, with a heat recovery steam generator producing process steam, operates at the DOMO plant at Beilen in the Netherlands. The plant, which produces dairy products, originally took its electric power (up to 3.2 MW) from the grid and its heat load was met by two gas-fired boilers with a steam production of 25 t/h at 13 bar. 

The CHP plant which replaced these two separate energy supplies is based on a Ruston TB gas turbine (rated at 3.65 MW) which can meet the electrical demand of 3.2 MW and is connected to the grid so that excess electrical power can be sold. By providing full gas power, up to 12 t/h of saturated steam can be produced at 191°C and 13 bar. Five supplementary gas burners can be engaged to increase the steam 

For the first operating condition (HRSG unfired) the heat load is estimated at 7.5 MW. For the second condition (HRSG fired) when 35 t/h of saturated steam is raised, the heat load is 23 MW. The values of heat to work ratios (A ) are thus 

Other parameters for the plant operating conditions—of HRSG unfired (WHR) and HRSG fired (WHB)—are as follows  

Unfired Steam (saturated) mass flow rate 12t/h  

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